Fig. 2.

Gray matter density is associated with OXTR methylation and baseline HF-HRV. (A)OXTR methylation positively is associated with gray matter in the right central amygdala, peak voxel xyz = 22, −10, −8, cluster extent = 7 voxels, P = 0.032; cluster displayed on coronal slice at z = −8. (B) Higher percent methylation is associated with increased gray matter volume, AU, arbitrary units.(C) Gray matter volume is in turn associated with lower baseline log HF-HRV, ms², milliseconds squared.